Adolphe Amadee Fesquet (1833-1894) was a chemical engineer and the author of a number of textbooks and translated French technical works into English. The collection comprises four volumes of educational course notes from lectures on mechanics, metallurgical chemistry, architecture, and the Catholic faith.

Charles A. Rosencrans (1908-1991) was an RCA engineer who specialized in radio transmission. His notebooks largely consist of fragmentary handwritten notes from both his career at RCA and from his studies in electrical and mechanical engineering at Lehigh University.

Charles Lee Reese, Sr. (1862-1940) was a chemist and scientist at the E. I. du Pont de Nemours & Company from 1902 to 1931. The Charles L. Reese papers are a group of material from his student days, the texts of lectures and articles, biographical materials and genealogical notes.

F. Weber & Company, Inc. is an American manufacturer and supplier of artists' materials. Ernest Gustav Weber (1888-1965) was owner Frederick Theodore Weber (1845-1919)'s son. After their father's death, Weber and his brother, Frederick William Weber (1890-1972), were business partners running the supply store. This item is Ernest Gustav Weber's journal. The journal contains income and expenses from 1905 and 1906. There are also some lists of correspondence, addresses, and travel information.

Joseph Lincoln Gillson (1895-1964) was the chief geologist for the DuPont Company's Development Department from 1929 to 1960. As chief geologist he traveled all over the world making explorations in search of sulfur, ilmenite, fluorspar, barytes, celestite, and other raw materials, as well as conducting investigations in search of ground water supplies, foundations, and general site studies. This is a small collection that consists of a set of notebooks and related documents from Gillson's time working for the DuPont Company, as well as a set of papers and related documents from consulting projects he did during his retirement.

Joshua Gilpin (1765-1841) was a Philadelphia merchant and paper manufacturer. His notebook describes the process of chlorine bleaching, with drawings and formulae.

Joshua Gilpin (1765-1841) was a Philadelphia merchant and paper manufacturer. The collection includes microfilm copies of Gilpin's notes on the bleaching of pulp in the manufacture of paper, with others on the same subject by Lawrence Greatrake (manager of the Gilpin mills) and William Stidolph.

Two nineteenth-century pharmacists formula books, one from William King (1823-1903), of Philadelphia, and one from Edward S. Townsend (1844-1913), of Philadelphia and Dover, Delaware. William King was a Philadelphia druggist and worked in the oil business, first as a jobber and then as a refiner. Edward S. Townsend was a druggist in Philadelphia and Delaware.

The Joseph Bancroft & Sons Company operated cotton textile mills in Wilmington, Delaware, where they manufactured, bleached, dyed, and finished a variety of cotton-made goods. The Pusey & Jones Corporation were shipbuilders, founders, and machinists of Wilmington, Delaware, which later expanded into papermaking machinery manufacturing. This collection consists of eleven small notebooks from the two companies regarding their work.

The Schuylkill Navigation Company constructed a canal along the Schuylkill River from Philadelphia to the anthracite coal field near Pottsville between 1815 and 1825. The item is a small notebook with subscriptions to the company's loans in 1823 and 1824.

William Douglass (1849-1925) worked his entire professional life in the steel industry. He was an educated steel worker and spent many years as foreman or superintendent at various jobs site, the majority being in Birmingham, Alabama. The papers are a collection of items partly documenting Douglass' career as a foreman in the steel industry in the Pittsburgh and Birmingham Districts from 1889-1915.

William E. Morris (1812-1875) was a civil engineer and railroad executive. The notebook contains fourteen separate specifications for canal and railroad work copied in longhand and a fifteenth in the form of an inserted printed handbill. They offer a good snapshot of early civil engineering practice and construction techniques. Evidence points to Morris as the notebook's author.

William Hasell Wilson (1811-1902) was a consulting engineer to the Pennsylvania Railroad Company. Wilson's notebook covers his early engineering career on the Philadelphia & Columbia and Philadelphia & Reading railroads. The notebook contains ink and wash drawings by Wilson, along with specifications and cost estimates for the construction of various types of track structure, bridges, turntables, stations and other buildings.

William Hasell Wilson (1811-1902) was a consulting engineer to the Pennsylvania Railroad Company. Wilson's notebook covers his early engineering career on the Philadelphia & Columbia and Philadelphia & Reading railroads. The notebook contains ink and wash drawings by Wilson, along with specifications and cost estimates for the construction of various types of track structure, bridges, turntables, stations and other buildings.

William Liseter Austin (1852-1932) was an executive of the Baldwin Locomotive Works in Philadelphia. Baldwin Locomotive Works was a manufacturer of railroad locomotives from 1825 until 1972. This small collection consists of six pocket notebooks carried by Austin on separate business trips between 1879 and 1892. The trips were undertaken to confer with representatives of Baldwin's customer railroads concerning proposed designs or faulty performance of Baldwin locomotives.